M. Fröb

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math-ph2025

Local operators in the Sine-Gordon model: $\partial_{I^} ¼ I ¨ \partial_{I^} ½ I ¨ $ and the stress tensor

Markus B. FrÃ¶b, Daniela Cadamuro

We consider the simplest non-trivial local composite operators in the massless Sine-Gordon model, which are $\partial_{I^} ¼ I ¨ \partial_{I^} ½ I ¨ $ and the stress tensor $T_{I^¼ I^½}$ . We sho…

math-ph2025

Petz-RÃ©nyi relative entropy in QFT from modular theory

Markus B. FrÃ¶b, Leonardo Sangaletti

We consider the generalization of the Araki-Uhlmann formula for relative entropy to Petz-RÃ©nyi relative entropy. We compute this entropy for a free scalar field in the Minkowski w…

math-ph2024

The Sine-Gordon QFT in de Sitter spacetime

Daniela Cadamuro, Markus B. FrÃ¶b, Carolina Moreira Ferrera

We consider the massless Sine-Gordon model in de Sitter spacetime, in the regime $Î²^2 < 4 Ï$ and using the framework of perturbative algebraic quantum field theory. We show that…

Local operators in the Sine-Gordon model: ∂I^​¼I¨∂I^​½I¨ and the stress tensor

Petz-RÃ©nyi relative entropy in QFT from modular theory

The Sine-Gordon QFT in de Sitter spacetime

Local operators in the Sine-Gordon model: $\partial_{I^} ¼ I ¨ \partial_{I^} ½ I ¨ $ and the stress tensor